Abstract

A perfect electric conductor surface with one-dimensional periodic rectangle holes is proposed as a surface-plasmon-like waveguide, where designed surface plasmon modes with very low group velocity are confined in a subwavelength region. It is shown that the half maximum of electric field intensity of the mode can be confined in a subwavelength region on the transversal plane and the group velocity approaches to zeros, where is the wavelength in vacuum.

Received 28 December 2006Accepted 22 April 2007Published online 15 May 2007

Acknowledgments:

This work is supported by the Swedish Foundation for Strategic Research (SSF) through the INGVAR program, the SSF Strategic Research Center in Photonics, and the Swedish Research Council (VR). One of the authors (Z.C.R.) acknowledges the partial support from the National Basic Research Program (973) of China under Project No. 2004CB719800.